The replacement projector lamp part number is BL-FP280E DE.5811116519-SOT DE and the lamp is guaranteed for 3000 hours of use.

This is a compatible quality replacement lamp for a OPTOMA EX779I Projector. It is not made by the original manufacturer, but is made to stict quality guidelines to be compatible with a BL-FP280E DE.5811116519-SOT DE replacement projector lamp

Diamond Lamps - Philips UHP™ / Osram VIP & P-VIP Authorised by Philips and Osram, the original bulb manufacturers for the above lamp, this is a lower cost alternative to the Original Manufacturers Lamp. Complete with a new chassis, this lamp gives identical performance to the Original Manufacturers Lamp with an unprecedented 4 month warranty, Although endorsed by a number of projector manufacturers, the lamp may invalidate some projector warranties; please check if the warranty on the projector is still current or affected before purchase.